Tevatron at LN2 temperature and LN2 usage is stable with vendor deliveries running only 2-3 truckloads per day due to the Tevatron being 1/4 at room temperature. Helium losses are steady at 15 kscf/day (1/2 of normal during TeV operations).

A1, A3, B4, and D1 are at room temperature and isolated with LOTO. E2 and F4 are also at room temperature, have been reconnected by Cryo, and are currently under normal helium flow with anticipation of Division sign-off and cooldown to LN2 temperature soon. F4 house can be cooled down to LN2 temperature without the TEL-1 installed. B4 has been completed by MSD and Cryo will start reconnection procedure. A3 has been completed by MSD, though spool piece conning towers may still be retrofitted (5 out of 8 leak) by Tech Division during this shutdown. Cryo has completed epoxy of helium leaks on Tevatron power leads, though they still need a snoop leak test.

Pbar D60 Debuncher vacuum work has been completed by Pbar Dept, thus Cryo personnel will restore helium/nitrogen connections and cool down tanks to LN2 temperature after Division sign-off.

ACNET application programs relating to FRIG operations are being tested on Linux consoles.

Nitrogen Reliquefier startup is delayed due to concern of “old” electrical cables being used for cross-connect between MSS and KRSS, especially due to high startup currents of 3000 hp TSI compressor. IR Booster compressor was started but had a loading valve failure that is being addressed.

MCR monitoring cryo operations.

CHL Maintenance:

General facility maintenance is in progress.

CHL Helium Compr “A” cooling tower installation has been completed with painting in progress. Some minor controls/electrical/instrumentation work is left.

CHL Helium Compr “D” is being overhauled.

Helium Coldbox-2 controls upgrade is in progress.

FRIG Maintenance:

Ring-wide overhauls of wet expanders in progress with 20/24 completed.

Various FRIG bldg vacuum maintenance and instrumentation repairs (e.g. lost charge on VPTs) are in progress, as well as support work on houses at room temperature and other equipment as things fail even during the shutdown period.

Completed Today The installation of the MI-8 beam dump will require alignment. Several kickers will be installed, one septa magnet, 1 BPM, 2 Toroids, beam pipe, 1 quad will be moved and two multiwires.

Scheduled New Texas multiwires will be installed in the MI8 line at 803, 826, 827, 829, and 836. These multiwires will need alignment.

P-Bar

Completed Elevation runs

Completed Set new AP2 beam stop on beam center once it is installed in the Transport enclosure.